Lock



Nov. 15, 1927.

V. CUTULI LOCK Filed Feb, 24, 1927 2 Sheets-Sheet 2 R O T N E V m Patented Nov. 15, 1927.

UNITED STATES 1,649,512 PATENT oFF-ice.

VINCENZO CUTULI, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO l FRED PERELLA, OF PITTSBURGH, PENNSYLVANIA.

LOCK.

v Application filed February 24, 1927. vSerial No. 170,545.

The invention relates to locks designedl c l in the same way as an ordinary lock, and

without any special manipulation. Briefly stated, the invention involves the use of a detent for the bolt, which must be released by a means other rthan the ordinary use of the key, before such lkey can be made to function to throw the bolt by the ordinary turning action. In its preferred embodiment, the detent referred yto may bey released by the key itself, but, only by turning the key upside down and pressing a projection on the key. downward to release the detent, but if desired, some other suitable member other than the key may be used to 4release the detent, such member being inserted through the keyhole to accomplish this result' before the key is inserted and turned inthe usual way. As a matter of convenience, however, it is preferred to construct the key so that it may be employed to perform the detent-releasing function. One embodiment of the invention is illustrated inthe accompanying drawings, wher-ein:

Figure l is a front view of the lock. Fig. 2 is a rear view with the parts in full locked position. Fig. 3 is a rear view with the parts after the detent is released. Fig. t is a rear view after the key is turned to move the parts to full unlocked position. Fig. 5 is a. rear view after the keyis given one turn to bring the parts t-o partly locking position. Fig. 6 isa partial section on the line VI-VI of Fig. 1 with the key in position releasing the detent. Fig. 7 is a side elevation of the key by itself. And Fig. 8 is a perspective view of one of the springs.

Referring to the drawings, 1 is the face plate of the lock provided with the keyhole 2, and 3 is a hasp having an eye l adapted to project through a slot 5 in the face plate. The eye is adapted to receive the bolt 6 of the lock (Fig. 2), the bolt being vguided in its movement-s by the loops'7 and 8 riveted or welded to ther face plate. Spaced to the rear ofthe faceplate is-the back plate 9,

riveted or bolted to the face plate, and.` provided with the usual key post 10, upon which the hollow shank of the key 11 pivots yhen the key is inserted through the key- -Lying beneath the back plate, and also secured to the face plate by riveting or welding, is a guide member or sleeve 12 in which the detent 13 is slidably mounted, such detent being provided with a horizontal arm 14 lying below the lower end of the keyhole, but accessible therethrough for release as later described. pin 15, projecting from the rear of the face plate, and comprising the arms 16 and 17,

serves to press the detent 13 yieldingly upward and to press the bolt 6 yieldingly to the left (Fig. 2), the arm 16 being shorter and therefore stiffer than the arm 17.

The bolthas, upon its upper side, the lock ing notches 18 and upon its lower side the abutments 20 and 21 adapted to be engaged under certain conditions by the key, as'later described. The S spring 22 acts as a locking means for the bolt, its middle portion being provided with a locking shoulder 23 (Fig. 8), which is yieldingly pressed 4down against the upper side. of the-bolt. The upper end` of the spring is secured tothe face plate by the rivet 24, whilethe lower end is recurved at 25, and lies in the path of the key in its movement of rot-ation, so that upon such movement the shoulder 23 is released by the j,key, leaving the bolt free to move to the left (Fig. 2) before the key engages one of the abutments 2,0 or 21.

lVith the parts in the full locked position of Fig. 2, if the key is insertedland turned counter-clockwise, with reference to Fig. 2, or clockwise with reference to Fig. 1, the bolt 6 will not be moved, first because the abutment 21 is too far to the right (Fig. 2) to be reached by the part 26 of the key, and second, because the detent 13 engaging the shoulder 27 on the bolt holds it against movement to the left. The bolt cannot bemoved by the key, therefore, until the detentisreleased and the Vbolt is movedslightlyto the left.

In order to release the detent, the key is inserted in the keyhole upside down, as indicated in Fig. 6, with the finger 28 lying inside the face platel. If the key is now pressed downward, the detent 13 is moved down against the tension of the spring arm A spring mounted on the y,

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17, thus moving the upper end ot the detent out or" engagement With the shoulder 27 on the bolt. The release ot the detent permits the spring arm 16 to move the bolt 6 slightly to the lett, the parts now occupying the position shown in Fig. 3.

The bolt may now be moved to iull unlocked position by the use of the key in the ordinary way. rlihe key is tneretore inserted so that its hollow shank engages the post 11 and is turned in a counterclockwise direction, Fig. 3. rEhe part 26 ot the key iirst strikes the lower end 25 otl the spring 22, moving such spring upward so that the shoulder is disengaged 'from the notch 18 on the bolt. 'further mov-ement of the key brings the part 26 into engagement with the abutment 21, the movement oit the bolt to the lett under the iniiuence ot the spring arm 16, heretofore referred to, having brought such abutment vithin reach of the part 26 ot the key. The continued movement ot' the key serves to nieve the bolt to complete open position, as 'ndicated in Fig. li, the eye l of the hasp tuus being released.

To move the bolt again to locking position, the key is inserted in the normal Way and given one complete rotation in a clockwise direction, the part 26 ot the key during such rotation engaging the abutment 2O and moving the bolt to the position ot Fig. 5. This movement of the bolt is not sullicient to bring the shoulder 27 tar enough to the right to be engagedby the detent, but is tar enough to cause the bolt to engage the eye e of the hasp. The lock may now be unlocked in the normal Way, by merely turning' the key in a counterclockwise direction, during which the part 26 engages the abutment 21 and moves the parts back to the position of F ig. 4t. rlhe lock may therefore be used, When desired, in the same manner as an ordinary lock, without bringing the detent 13 into play.

To completely lock the bolt by bringing.

the detent into play and causing the parts to again assume the position ot Fig. 2, the key, ai-'ter bringing the parts to the position oit Fig. 5, is given a second movement oft rotation in a clockwise direction. rlhe key, during` this movement of rotation, engages the second abutment 21 on the bolt and moves the bolt to the right to the position of Fig. 2. rlihis movement places both oli the spring arms 16 and 17 under tension, the tension in the arm 17 causing the detent 13 to move up and engage the bolt behind the shoulder 27, thus completing the cycle, so that the bolt cannot be again moved to unlocking position Without first releasing the detent as heretoii'ore described.

It will be apparent that 'the invention is not limited Ato the particular einbodin'ient shown. lt is applicable to almostany lock employing a belt and a key, and the details ot the mechanism may be varied Widely depending on the type ot lock to which the invention is applied. t desired, the detent may be released by some means other than a linger forming a part of the key, as heretotore pointed out, although this construction is preferred.

vWhat l claim is:

1. ln combination in a lock adapted to be locked and unlocked by a key, a tace plate locked and unlocked by a key, a tace plate provided with keyhole, a bolt adapted to be reciproeated by the rotationY of the key, a detent out of the reach of the key during the normal rotary movement of the key in either direction engaging the bolt and positively holding it against unlocking movement by the key, and a spring tor movingtlie bolt iiar enough toward unlocked position when the detent is released to permit such bolt to be engaged and moved to full unv locked position by the key, the said detent being accessible 'for release by means inserted through the keyhole.

3. ln combination in a lock adapted to be locked and unlocked by key, a tace plate provided with a keyhole, a bolt 4provided with tivo locking abut-ments so thattvvo rotations ot the key are required to move it to completely closed position, a detent for engag-ingv and positively locking the bolt against opening movement when it reaches full closed position, a spring under tension tending to move the bolt to partly unlocked position when the detent is released, the said bolt having one ot said abutments located so that one rotation et the key will open it from said partly unlocked position, and said detent being accessible tor actuation by means inserted through the keyhole.

4;. ln combination in a lock adapted to be locked and unlocked by a key, a` tace plate provided with a keyhole, a bolt provided with tivo locking' abutments so thattwo rotations of the key are required to move it to completely closed position, a detent for engaging Vand positively locking the bolt against opening movement When it reaches full closed position, a spring under tension tending to move the bolt to partly unlocked position When the detent is released, the said bolt having its abutments located so that a rotation oi the key in one direction Will move it trom said partly unlocked position to completely locked position, and a rotation in the other direction from said' partly unine locked position Will completely unlock it, the said detent being accessible for actuation by means inserted through the keyhole.

5. In combination in a lock adapted to be locked and unlocked by a key, a face plate provided with a keyhole, a bolt provided with two locking abutments so that tWo rotations of the key are required to move it to completelyclosed position, a detent for engaging and positively locking the bolt against opening movement when it reaches full closed position, a spring under tension tending to move the bolt to partly unlocked position when the detent is released, the said bolt having its abutments so located that a rotation of the key will move it from said partly unlocked position to completelyunlocked position, and so that a reverse rotation from said completely unlocked position will move it to said partly locked position, the said detent being accessible for actuation by means inserted through the keyhole preliminary to the rot-ation of the key.

In testimony whereof, I have hereunto subscribed my name this 19t-h day of February, 1927.

VINCENZO CUTULI. 

